$OpenBSD: patch-png2ico_cpp,v 1.1 2017/04/18 00:31:54 espie Exp $
--- png2ico.cpp.orig	Tue Apr 18 02:28:04 2017
+++ png2ico.cpp	Tue Apr 18 02:28:22 2017
@@ -33,6 +33,7 @@ Notes about transparent and inverted pixels:
 
 
 #include <cstdio>
+#include <cstdlib>
 #include <vector>
 #include <climits>
 
